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首页> 美国卫生研究院文献>Materials >The Effects of Aluminum-Nitride Nano-Fillers on the Mechanical Electrical and Thermal Properties of High Temperature Vulcanized Silicon Rubber for High-Voltage Outdoor Insulator Applications
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The Effects of Aluminum-Nitride Nano-Fillers on the Mechanical Electrical and Thermal Properties of High Temperature Vulcanized Silicon Rubber for High-Voltage Outdoor Insulator Applications

机译：氮化铝纳米填充剂对高压户外绝缘子应用的高温硫化硅橡胶的机械电气和热性能的影响

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摘要

AlN nanoparticles were added into commercial high-temperature-vulcanized silicon rubber composites, which were designed for high-voltage outdoor insulator applications. The composites were systematically studied with respect to their mechanical, electrical, and thermal properties. The thermal conductivity was found to increase greatly (>100%) even at low fractions of the AlN fillers. The electrical breakdown strength of the composites was not considerably affected by the AlN filler, while the dielectric constants and dielectric loss were found to be increased with AlN filler ratios. At higher doping levels above 5 wt% (~2.5 vol%), electrical tracking performance was improved. The AlN filler increased the tensile strength as well as the hardness of the composites, and decreased their flexibility. The hydrophobic properties of the composites were also studied through the measurements of temperature-dependent contact angle. It was shown that at a doping level of 1 wt%, a maximum contact angle was observed around 108°. Theoretical models were used to explain and understand the measurement results. Our results show that the AlN nanofillers are helpful in improving the overall performances of silicon rubber composite insulators.
机译：将AlN纳米颗粒添加到商业高温硫化硅橡胶复合材料中，该复合材料专为高压户外绝缘子应用而设计。对复合材料的机械，电气和热性能进行了系统的研究。发现即使在低含量的AlN填料的情况下，热导率也会大大提高（> 100％）。 AlN填料对复合材料的电击穿强度没有显着影响，而发现介电常数和介电损耗随AlN填料比例的增加而增加。在高于5 wt％（〜2.5 vol％）的较高掺杂水平下，电跟踪性能得到改善。 AlN填料增加了复合材料的拉伸强度和硬度，并降低了其柔韧性。还通过测量温度依赖性接触角来研究复合材料的疏水性。结果表明，在1wt％的掺杂水平下，在108°附近观察到最大接触角。理论模型用于解释和理解测量结果。我们的结果表明，AlN纳米填料有助于改善硅橡胶复合绝缘子的整体性能。

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